2D array into graphicview to create Objects from 2D-Array

[projectbavaria]

This code should show the 2D-Array to Graphicview
name of Graphicview in GUI is "view"
The Problem is that i don't get the acknockledge to implement a array to a graphicview.
Because i want to create a game of this 2D-Array and creating objects from them.
But i can't even display it and i don't know how can i convert my letters (S,X,G => 2D_Array) to GUI with Graphicview ?

const int xarrSize = 13;
    const int yarrSize = 60;

    int x = 0;
    int y = 0;
    char c;
    char grid[xarrSize][yarrSize];
    
    fstream input;
    input.open("C:/map.txt",fstream::in);
    if (!input) {
        cout << "not open";
    }
    while (input >> noskipws >> c) {
       if (c == '\n'){
            x++;
            y = 0;
            grid[x][y] = c;

    }
    else {
        grid[x][y] = c;
        y++;
    }
    }
    scene = new QGraphicsScene(this);
   
   
    for (int i = 0; i < xarrSize; ++i) {
       
     for (int j = 0; j < yarrSize; ++j) {
         scene->addItem(grid[i][j]);       
 

//not possible to convert this array to GraphicsItem from a typ of char
         ui->view->setScene(grid);
                }
     cout << "\n";
            }

[projectbavaria]

QPixmap outPixmap = QPixmap(xarrSize,yarrSize);
  outPixmap.loadFromData(grid);

  // Bild-Datei anzeigen

  ui->label->setPixmap(outPixmap);
  ui->label->show();

but doesn't know the loadFromData..
i will try more

[JonB]

@projectbavaria said in 2D array into graphicview to create Objects from 2D-Array:

outPixmap.loadFromData(grid);
but doesn't know the loadFromData..

What type is grid? If it's your char grid[xarrSize][yarrSize] then your call does not correspond to either overload https://doc.qt.io/qt-5/qpixmap.html#loadFromData or https://doc.qt.io/qt-5/qpixmap.html#loadFromData-1.

[projectbavaria]

@JonB it is a 2D Array -> array Char [x][y]
yeah i will look on your link

[projectbavaria]

can't go on i will look From Matrix to QImage and QPixmap on forum.. maybe that will help

[SGaist]

Hi,

Do you mean you have a two dimensional array of chars that you want to build a grid with and that each of the cell of that grid shall contain the letter at that point of the array ?

[projectbavaria]

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[projectbavaria]

This post is deleted!

[projectbavaria]

@projectbavaria 

[projectbavaria]


now i getting a black screen and try to go on

[SGaist]

From what you posted, there's nothing added to the scene and your view seems to be a local variable so unless it's in your main function body, it will be destroyed before you can even see it.

[projectbavaria]

@SGaist but before i destroying it i have to handle that i want to save my array(inside there are my chars) as a QtPiximap -> after that i can show it in GraphisScene ?

[SGaist]

Except that you are not using your array to draw anything. You are using a QBitArray which contains nothing to draw on a image that you then use as brush.

You should start by just drawing on that QImage properly and set it on a QLabel to see what it would look like. And once you have that working, come back to your QGraphicsView part.

[projectbavaria]

@SGaist okey i will try